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%I #3 Mar 30 2012 17:24:45
%S 1,4,7,25,28,49,172,175,196,343,1201,1204,1225,1372,2401,8404,8407,
%T 8428,8575,9604,16807,58825,58828,58849,58996,60025,67228,117649,
%U 411772,411775,411796,411943,412972,420175,470596,823543
%N The terms of A055258 (sums of two powers of 7) divided by 2.
%F (7^n + 7^m) / 2, n = 0, 1, 2, 3 ..., m = 0, 1, 2, 3, ... n.
%e a(4) = 25 = (7^2+7^0) / 2
%Y Cf. A055258.
%K easy,nonn
%O 1,2
%A _Jeremy Gardiner_, Jul 21 2002
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